@article{GDZPPN002475979, title = {An Extended Notion of Refinement-Unboundedness.}, journal = {Monatshefte f\"ur Mathematik}, volume = {72}, year = {1968}, pages = {9-17}, zbl = {0195.34202}, url = {http://dml.mathdoc.fr/item/GDZPPN002475979} }
Appling, William D.L. An Extended Notion of Refinement-Unboundedness.. Monatshefte für Mathematik, Tome 72 (1968) pp. 9-17. http://gdmltest.u-ga.fr/item/GDZPPN002475979/